125767021 has 8 divisors (see below), whose sum is σ = 126898200. Its totient is φ = 124640832.

The previous prime is 125767001. The next prime is 125767043. The reversal of 125767021 is 120767521.

It can be written as a sum of positive squares in 4 ways, for example, as 67076100 + 58690921 = 8190^2 + 7661^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125767021 - 2¹¹ = 125764973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125767001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63555 + ... + 65503.

It is an arithmetic number, because the mean of its divisors is an integer number (15862275).

Almost surely, 2^125767021 is an apocalyptic number.

It is an amenable number.

125767021 is a deficient number, since it is larger than the sum of its proper divisors (1131179).

125767021 is a wasteful number, since it uses less digits than its factorization.

125767021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 125767021 is about 11214.5896492025. The cubic root of 125767021 is about 501.0206099598.

The spelling of 125767021 in words is "one hundred twenty-five million, seven hundred sixty-seven thousand, twenty-one".